Home / 20,447.04-28,235.40-12,906.72

Finding the Fourth Proportional to 20,447.04, 28,235.40 and 12,906.72

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Solution

The fourth proportional to 20,447.04, 28,235.40 and 12,906.72 is: 17,822.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.04 : 28,235.40 = 12,906.72 : x
  2. Step 2: Convert to fraction form
    20,447.04/28,235.40 = 12,906.72/x
  3. Step 3: Cross multiply
    20,447.04x = 28,235.40 × 12,906.72
  4. Step 4: Simplify right side
    20,447.04x = 364,426,401.89
  5. Step 5: Solve for x
    x = 364,426,401.89/20,447.04
  6. Step 6: Final answer
    x = 17,822.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.